ClassCastException between ListGridRecord and Record

[levi]

Hi, I'm using Records as underlying data of a DataSource. This is being used in a ListGrid. (I want to use the same DataSource for any component, not just restrict it to a ListGrid).

Somewhere in the event pump, this class is being called and this throws the exception at return (ListGridRecord) obj;

public class ListGridRecord extends Record {

    public static ListGridRecord getOrCreateRef(JavaScriptObject jsObj) {
        if(jsObj == null) return null;
        RefDataClass obj = RefDataClass.getRef(jsObj);
        if(obj != null) {
            obj.setJsObj(jsObj);
            return (ListGridRecord) obj;
        } else {
            return new ListGridRecord(jsObj);
        }

My obj really is a Record:

jsObj	JavaScriptObject$  (id=4245)	
	hostedModeReference	JsValueIE6  (id=4251)	
		variant	Variant  (id=4252)	
			booleanData	false	
			byRefPtr	0	
			byteData	0	
			charData	
			dispatchData	IDispatch  (id=4253)	
				address	799049232	
			doubleData	0.0	
			floatData	0.0	
			intData	0	
			longData	0	
			shortData	0	
			stringData	null	
			type	9	
			unknownData	null	
obj	Record  (id=4222)	
	jsObj	JavaScriptObject$  (id=4245)	
	manager	null

Shouldn't there be a constructor ListGridRecord(Record c) at that place?


(version: SmartGWT 1.1 release)


thx

[sjivan]

Can you post your code that is causing this?

[levi]

Hi Sanjiv,

Can't really paste all code, but I've bottled it down:

executeFetch(String requestId, DSRequest request, DSResponse response)

... do servlet call and onSuccess:


response.setData((Record[]) data.values().toArray(new Record[data.size()]));
processResponse(requestId, response);

data is a Map<String, Record> data= new TreeMap<String, Record>();
and if I populate it with Record r = new Record();
then the class cast exception occurs
If I populate it with Record r = new ListGridRecord();
then no error occurs, but then I wonder if I can use this datasource on any other non-ListGrid or TreeGrid widget?